Unbreakable: The Spies Who Cracked the Nazis’ Secret Code

描述

Author: Rebecca E. F. Barone

Publisher: Square Fish

As the Germans waged a brutal war across Europe, details of every Nazi plan, every attack, every troop movement were sent over radio. But to the Allied troops listening in―and they were always listening―the crucial messages sounded like gibberish. The communications were encoded with a powerful cipher, making all information utterly inaccessible . . . unless you could unlock the key to the secret code behind the German’s powerful Enigma machine.